Alamo Heights, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alamo Heights, a city in Bexar County, Texas.
Today
98°F
Mostly Sunny
Mostly sunny, with a high near 98. Heat index values as high as 104. South southeast wind 5 to 10 mph.
7-day forecast for Alamo Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Mostly Sunny | 5 to 10 mph SSE | 7% |
| Tonight | 78°F | Mostly Clear | 5 to 15 mph SSE | 7% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 2% |
| Wednesday Night | 77°F | Partly Cloudy | 5 to 15 mph SE | 1% |
| Thursday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Thursday Night | 77°F | Partly Cloudy | 5 to 10 mph SSE | 3% |
| Friday | 97°F | Mostly Sunny | 5 to 10 mph SE | 3% |
| Friday Night | 77°F | Partly Cloudy | 5 to 10 mph SE | 4% |
| Saturday | 95°F | Mostly Sunny | 0 to 10 mph SE | 4% |
| Saturday Night | 77°F | Mostly Clear | 5 to 10 mph SE | 3% |
| Sunday | 95°F | Sunny | 0 to 10 mph SSE | 4% |
| Sunday Night | 77°F | Mostly Clear | 5 to 10 mph SSE | 3% |
| Monday | 97°F | Mostly Sunny | 5 to 10 mph SSE | 5% |
| Monday Night | 77°F | Mostly Clear | 10 to 15 mph SSE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Alamo Heights (29.483, -98.468). Updated through the day.
Growing snapshot for Alamo Heights
Last spring frost
Feb 25
First fall frost
Nov 28
Growing season
277 days
Hardiness zone
9a
More local growing data for Alamo Heights: nearby ZIP 78209 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, San Antonio Incarnate Word, Tx (1.6 mi from Alamo Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.